In Ethernet when Manchester coding is used, the bit rate is__________.

Answer: Half the baud rate

Explanation: In Manchester coding each bit period is divided into two halves with a transition in the middle representing the bit value. That means the physical signal has two symbol intervals per data bit, so the symbol (baud) rate is twice the bit rate. Rearranging gives bit rate = 1/2 × baud rate.

• Each data bit is represented by two level intervals (one per half-bit).

• Therefore symbols per second (baud) = 2 × bits per second, so bits per second = 1/2 × baud.